CTRL/W
When you type CTRL/W (control-W), the monitor deletes the last word
you typed.
A word is defined as all spaces, tabs, and alphanumeric characters
until a nonalphanumeric character is encountered.
On video terminals, the deleted word is erased from the screen.
On hard-copy terminals, the deleted word is printed backwards between
backslashes.
Example
Type the characters SET TTY TYPE L036, type CTRL/W, and type the
correct characters.
.SET TTY TYPE L036\630L\LA36<RET>
.